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1. Conclusion MRI can accurately show the focal osteochondral lesions.

2. Objective To investigate the MRI features of osteochondral fracture in the joint surface.

3. Xray and MRI: osteochondral fractures in external condyles, 2 case; osteochondral fracture in internal condyle, 1 case.

4. Osteoarthrosis or osteochondral tissue destroy of mandibular condyle are common diseases clinically.

5. Cryopreservation of bone and osteochondral allografts has significance in revision surgery of large bone defects and oseoarticular reconstructive surgery.

6. Methods: Nineteen patients with symptomatic chondral and osteochondral lesions of the knee who were treated with fresh osteochondral allografts between 1999 and 2002 were prospectively followed.

7. To an animal model of osteochondral defect in temporomandibular by arthroscope to minimize the surgical injury.

8. Objective To create an animal model of osteochondral defect in temporomandibular joint(TMJ) by arthroscope to minimize the surgical injury.

9. Stem cells for treating osteochondral defect, femoral head necrosis and spinal nerve injury have obtained many achievements in clinic.

10. Conclusions: Osteochondral fracture of the lateral femoral condyle is an injury to which adolescents with ligamentous laxity of the knee are prone.

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11. Background: Large osteochondral fractures of the lateral femoral condyle of the knee in adolescent patients can be diagnostically and therapeutically challenging.

12. High tibial osteotomy and osteochondral or chondrocyte transplantation can be used in middle stage.

13. Methods The clinical data of 14 cases with osteochondral fracture of patella in adolescent were analyzed.

14. The other four patients had an isolated osteochondral defect with reparative tissue within the base of the defect.

15. Conclusion MRI can accurately reveal and diagnose the osteochondral fracture of knee after trauma, which improves the diagnostic certainty and is very helpful for arthroscopy and operation.

16. Results 110 lesions were found and were divided into 3 types: occult subcortical fracture, occult cortical fracture and occult osteochondral fracture according to the range and degree of injuries.

17. It is also possible that the nidus of the osteochondral loose body was a completely detached portion of calcified ligamentum flavum.

18. Conclusion There are fewer injuries and bias in the animal models of TMJ osteochondral defect by arthroscope than by open-surgery.

19. This study assessed open reduction and internal fixation of the osteochondral fragments with use of multiple polyglycolic acid rods.

20. Question: In children with osteochondritis dissecans (OCD) injuries of the knee, is osteochondral autologous transplantation (OAT) more effective than microfracture?

21. Depending on the characteristic of self-proliferation and multidifferentiation, it was possible that fabrication osteochondral composite using scaffolds of different materials and MSCs.